/* Copyright (c) 2020 XEPIC Corporation Limited */
/*
 * Copyright (c) 2002-2013 Michael Ruff (mruff at chiaro.com)
 *
 *    This source code is free software; you can redistribute it
 *    and/or modify it in source code form under the terms of the GNU
 *    General Public License as published by the Free Software
 *    Foundation; either version 2 of the License, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA.
 */

#include <string.h>
#include <veriuser.h>
#include <vpi_user.h>

/*
 * mc_scan_plusargs implemented using VPI interface
 */
char *mc_scan_plusargs(char *plusarg) {
  int argc, diff;
  char **argv;
  s_vpi_vlog_info vpi_vlog_info;

  /* get command line */
  if (!vpi_get_vlog_info(&vpi_vlog_info)) return (char *)0;

  /* for each argument */
  argv = vpi_vlog_info.argv;
  for (argc = 0; argc < vpi_vlog_info.argc; argc++, argv++) {
    char *a, *p;
    a = *argv;
    p = plusarg;

    /* only plusargs */
    if (*a != '+') continue;
    a += 1;

    /* impossible matches */
    if (strlen(a) < strlen(p)) continue;

    diff = 0;
    while (*p) {
      if (*a != *p) {
        diff = 1;
        break;
      }
      a++;
      p++;
    }

    if (!diff) return a;
  }

  /* didn't find it yet */
  return (char *)0;
}
